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Diagnosis of Chlamydia

Diagnosis of chlamydia often relies on screening tests since most people have no symptoms. Screening tests are used on high-risk groups of people who show no signs or symptoms of infection. This is done to maximize early diagnosis and treatment of sexually transmitted diseases (STDs).

Chlamydia may also be suspected based on your symptoms (if you have them).

Testing can be done on fluid from a swab from the penis, cervix, throat, or rectum, or with a urine test. The fluid is often tested with nucleic acid amplification tests (NAAT). This test can also diagnose gonorrhea .

If you think you have been exposed to chlamydia, it may make you feel anxious or embarrassed to seek care from your doctor. Home test kits are widely available, but they are not as accurate as testing at your doctor's office, which can lead to a missed diagnosis. If you choose to use a test kit, it is important to follow-up with your doctor, regardless of the results. In the long run, it's best to have a doctor you feel comfortable with, so you can seek help when you need it.

If you are concerned about the cost of testing or currently don't have a doctor available, search for local community health or family planning centers that may offer testing services. Some testing services may be available for free.

Revision Information

  • Chlamydia—CDC fact sheet. Centers for Disease Control and Prevention website. Available at: http://www.cdc.gov/std/chlamydia/STDFact-chlamydia-detailed.htm. Updated September 24, 2015. Accessed March 14, 2016.

  • Chlamydia genital infection. EBSCO DynaMed website. Available at: http://www.ebscohost.com/dynamed. Updated February 15, 2016. Accessed March 14, 2016.

  • Cook RL, Hutchison SL, Ostergaard L, et al. Systematic review: noninvasive testing for chlamydia trachomatis and neisseria gonorrhoeae. Ann Intern Med. 2005;142:914-925.

  • Chlamydia testing. Lab Tests Online—American Association for Clinical Chemistry website. Available at: http://labtestsonline.org/understanding/analytes/chlamydia/tab/glance. Updated December 16, 2015. Accessed March 14, 2016.

  • LeFevre M. Screening for chlamydia and gonorrhea: US Preventive Services Task Force Recommendation Statement. Ann Intern Med. 2014;161(12):902-910. Available at: http://annals.org/article.aspx?articleid=1906843. Accessed March 14, 2016.

  • Mishori R, McClaskey, EL, et al. Chlamydia trachomatis infections: Screening, diagnosis, and management. Am Fam Physician. 2012;86(12):1127-1132.

  • van Dommelen L, van Tiel FH, et al. Alarmingly poor performance in Chlamydia trachomatis point-of-care testing. Sex Transm Infect. 2010;86(5):355-359.

  • Workowski KA, Berman S, Centers for Disease Control and Prevention. Sexually Transmitted Diseases Treatment Guidelines, 2010. MMWR. 2010;59(No. RR-12):1-110.

The health information in this Health Library is provided by a third party. Parkridge Health System does not in any way create the content of this information. It is provided solely for informational purposes. It does not constitute medical advice and is not intended to be a substitute for proper medical care provided by a physician. Always consult with your doctor for appropriate examinations, treatment, testing, and care recommendations. Do not rely on information on this site as a tool for self-diagnosis. If you have a medical emergency, call 911.